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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. NANCY ANN LETASSY PHARM.D.
NPI 1558349142
Pharmacist - Pharmacotherapy in Oklahoma City, OK

Active since January 04, 2006
900 NE 10TH ST, OKLAHOMA CITY, OK 73104(405) 271-2900 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Nancy Ann Letassy Pharm.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. NANCY ANN LETASSY PHARM.D. (NPI 1558349142) is an individual pharmacotherapy provider in Oklahoma City, Oklahoma, licensed in Oklahoma (10702) and active in the NPI registry since January 2006.

NPPES Registry Identity

NPI1558349142
Entity TypeIndividualFemale
Primary Taxonomy1835P1200X
Provider Legal NameDR. NANCY ANN LETASSYCredential: PHARM.D.
Location Address900 NE 10TH STOklahoma City, OK 73104-5420
Mailing Address3600 Cactus DrEdmond, OK 73013-7903 · (405) 271-2900
Phone(405) 271-2900
Sole ProprietorNo
Enumeration DateJanuary 4, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1558349142 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPharmacist · PharmacotherapyPharmacy Service Providers
Taxonomy Code1835P1200X
License✔ Licensed in OK · 10702
Definition
A licensed pharmacist who has demonstrated specialized knowledge and skill in optimizing pharmacotherapeutic care of patients, by developing, implementing, monitoring, and modifying complex treatment plans, providing advanced level education and consultation, and collaborating with other health professionals in the management of therapy.
900 NE 10TH ST, Oklahoma City, OK 73104
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ANGIE RACHEL THOMAS PA-C
Physician Assistant
900 NE 10TH ST
OKLAHOMA CITY, OK 73104
Oklahoma County (405) 514-5640
DEWEY C SCHEID MD
Family Medicine
900 NE 10TH ST
OKLAHOMA CITY, OK 73104
Oklahoma County (405) 271-4311
ALEJANDRO ANZALDUA MD
Family Medicine
900 NE 10TH ST, FMC 2102
OKLAHOMA CITY, OK 73104
Oklahoma County (405) 271-2230
DR. GURDEEP SINGH GREWAL MD
Family Medicine
900 NE 10TH ST
OKLAHOMA CITY, OK 73104
Oklahoma County (405) 271-4311
ERIK WILLIS
Family Medicine
900 NE 10TH ST
OKLAHOMA CITY, OK 73104
Oklahoma County (405) 271-2230
BOARD OF REGENTS OF THE UNIVERSITY OF OKLAHOMA-OU PHYSICIANS
Clinic/Center
900 NE 10TH ST
OKLAHOMA CITY, OK 73104
Oklahoma County (405) 271-4311
NATASHA G THOMAS
Pharmacist
900 NE 10TH ST
OKLAHOMA CITY, OK 73104
Oklahoma County (405) 271-4311
ASHLEY DIANE VO MD
Family Medicine
900 NE 10TH ST
OKLAHOMA CITY, OK 73104
Oklahoma County (405) 271-4311

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nancy Letassy's NPI number?

The NPI number for Nancy Letassy is 1558349142. It was assigned to this individual provider in the NPPES registry on January 4, 2006.

Where is Nancy Letassy located?

Nancy Letassy practices at 900 NE 10th St, Oklahoma City, OK 73104. The listed phone number is (405) 271-2900.

What is Nancy Letassy's specialty?

The primary specialty registered for this NPI is Pharmacist, specializing in Pharmacotherapy, with taxonomy code 1835P1200X.

When was this NPI record last updated?

The NPPES record for Nancy Letassy was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 27 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.